The interpretive outline drawing of theropod tracks at

Late Jurassic dinosaur footprints from Chassiron–La Morelière (Oléron Island, western France)

Lower cretaceous avian-dominated, theropod, thyreophoran, pterosaur and turtle track assemblages from the Tugulu Group, Xinjiang, China: ichnotaxonomy and palaeoecology [PeerJ]

Distinguishing Theropod and Ornithopod Tracks

Full article: Early Jurassic theropod elongate tracks with metatarsal marks from Yunnan, China

Theropod sketch practice by azurilyum on DeviantArt

Unusual dinosaur trackway preservation as clues to paleo-landscape and behavior from the Lower Cretaceous Luohe Formation, Shaanxi Province, China - ScienceDirect

The importance of 3D for tracks -or- how big is your footprint really! – Prof. Peter L. Falkingham

The interpretive outline drawing of pterosaur tracks at Huangyangquan

Tourism and Dinosaurs (U.S. National Park Service)